Control of the water permeability of polyelectrolyte multilayers by deposition of charged paraffin particles

Karine Glinel, Michelle Prevot, Rumen Krustev, Gleb B. Sukhorukov, Alain M. Jonas, Helmuth Möhwald

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

We present a new way to protect polyelectrolyte multilayers from water, consisting in the adsorption and subsequent fusing of charged wax particles atop a multilayer. The formation of the wax layer is demonstrated by different techniques such as ellipsometry, contact angle measurements, and atomic force microscopy. The diffusion of water in protected and unprotected multilayers is studied by in situ neutron reflectometry. Whereas a top layer of wax crystals already allows substantial reduction of the diffusion, the fusion of this top layer leads to the dominating exclusion of water from the multilayers when dipped in water. This method opens up new interesting avenues for polyelectrolyte multilayers in practical applications where permeability of water, ions, or hydrophilic drugs is an issue.

Original languageEnglish
Pages (from-to)4898-4902
Number of pages5
JournalLangmuir
Volume20
Issue number12
DOIs
Publication statusPublished - 8 Jun 2004
Externally publishedYes

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